'94 tbi 350 timing adjust

This is a discussion on '94 tbi 350 timing adjust within the Technical / Maintenance forums, part of the General Discussion category; i had varying answers to this question...
Can i treat the &quot;distributor&quot; on this motor like any other distributor...I.E. advance/retard ...

Re: '94 tbi 350 timing adjust

Originally Posted by 1992silverado

so this brown or brown with black stripe wire is behind the relay panel like where the fuel pump relay is?

It's right on the firewall under the plastic cover next to where your A/C lines go in. It's a brown and has a white plastic connector on it. It's the only wire in there that looks like it could be disconnected easily. Don't try to set the timing without disconnecting it first. My '88 ran best with 8 degrees, but that was with an LT1 cam. At 0 degrees, the thing was a huge turd! Once I started to bump the timing up, it really came to life.

Re: '94 tbi 350 timing adjust

My 94 w/ 350cid is about 7* advanced. This is where it runs best. I noticed the more mods that I did, the greater it would hesitate of the line and fall on its face. To correct this I would advance the timing 1-2 degrees till the hesitation was gone, (as long as I didnt here any knocking). This really gave me great response of the line and at the track. Hope this helps.

Re: '94 tbi 350 timing adjust

The 305 in my pops truck is running close to 10 degrees advanced. When we set it at 0 it fell on its face and couldn't get out of its own way. It's running an E-brock cam, intake and headers. Moved it by ear till she ran good and rechecked it. Right around 10 degrees is where she likes it!

Re: '94 tbi 350 timing adjust

i have the 1994 4.3 TBI. if you start the engine, loosen the distributor clamp then twist the distributor to the left or right. whichever makes it run smoother. find the perfect balance and your truck will run amazing. my truck used to shudder violently when it was turned off but after the timing was advanced it turned off smoothly. 2 years of thinking it was normal. when the timing was retarded, it sounded sweet with some great back fire but absolutely no power from 600-3000 RPM